Prepare for migration from ts_library to ts_project

With the upcoming migration from rules_nodejs to rules_js, I am
changing all the `ts_library` targets to become `ts_project` targets.

This patch introduces an alias for a NOP effect. A future patch will
switch the actual implementation.

I am leaving the scouting directory alone because all the build rules
will change completely. They will use Angular-specific rules.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: I4b4fd4d14dbf25d6dbdaa3c1725ee6b651eedab6
diff --git a/y2019/vision/server/BUILD b/y2019/vision/server/BUILD
index 93172b4..b0b7674 100644
--- a/y2019/vision/server/BUILD
+++ b/y2019/vision/server/BUILD
@@ -1,9 +1,9 @@
+load("//tools/build_rules:js.bzl", "ts_project")
 load("//aos/seasocks:gen_embedded.bzl", "gen_embedded")
 load("@com_google_protobuf//:protobuf.bzl", "cc_proto_library")
 load("//frc971/downloader:downloader.bzl", "aos_downloader_dir")
-load("@npm//@bazel/typescript:index.bzl", "ts_library")
 
-ts_library(
+ts_project(
     name = "demo",
     srcs = [
         "demo.ts",